{"product_id":"watts-9d-m3-backflow-preventer-w-atmospheric-vent-175-psi-250-f","title":"WATTS 9D-M3 BACKFLOW PREVENTER W ATMOSPHERIC VENT 175 PSI 250°F","description":"\u003ch3 data-section-id=\"17lc1ru\" data-start=\"0\" data-end=\"16\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"17\" data-end=\"729\"\u003eThe Watts 9D-M3 Backflow Preventer with Atmospheric Vent is a dual check valve backflow preventer designed to prevent backpressure and backsiphonage from contaminating potable water systems in continuous-pressure, non-health hazard applications. Commonly installed in boiler feed lines, laboratory equipment, sterilizers, processing tanks, dairy equipment, and commercial water supply systems requiring reliable backflow protection. Maintenance technicians, plumbing contractors, facility operators, and system integrators use this device for code compliance, replacement projects, preventive maintenance, and new installations requiring dependable cross-connection control. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"731\" data-end=\"748\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"749\" data-end=\"1667\"\u003eThe Watts 9D-M3 Backflow Preventer is widely used in boiler feed water systems, commercial heating systems, laboratory facilities, sterilization equipment, dairy operations, food processing plants, manufacturing facilities, processing tanks, institutional buildings, schools, hospitals, mechanical rooms, and industrial process systems. The dual check design with intermediate atmospheric vent prevents polluted water from flowing back into potable water supplies during backpressure or backsiphonage events. It is commonly specified for smaller supply lines where continuous-pressure protection is required and is especially recommended for boiler feed applications where maintaining potable water safety and regulatory compliance is critical. The unit can be installed horizontally or vertically and includes an integral strainer to help protect internal components from debris. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1669\" data-end=\"1698\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1699\" data-end=\"2643\"\u003e• Brand: Watts\u003cbr data-start=\"1713\" data-end=\"1716\"\u003e• Model: 9D-M3\u003cbr data-start=\"1730\" data-end=\"1733\"\u003e• Product Type: Dual Check Valve Backflow Preventer with Atmospheric Vent\u003cbr data-start=\"1806\" data-end=\"1809\"\u003e• Series: 9D\u003cbr data-start=\"1821\" data-end=\"1824\"\u003e• Backflow Preventer Type: Dual Check with Intermediate Atmospheric Vent\u003cbr data-start=\"1896\" data-end=\"1899\"\u003e• Body Material: Forged Brass\u003cbr data-start=\"1928\" data-end=\"1931\"\u003e• Internal Components: Stainless Steel\u003cbr data-start=\"1969\" data-end=\"1972\"\u003e• Check Valve Material: Rubber\u003cbr data-start=\"2002\" data-end=\"2005\"\u003e• Seat Material: Rubber\u003cbr data-start=\"2028\" data-end=\"2031\"\u003e• Integral Strainer: Yes\u003cbr data-start=\"2055\" data-end=\"2058\"\u003e• Protection Type: Backpressure and Backsiphonage Prevention\u003cbr data-start=\"2118\" data-end=\"2121\"\u003e• Hazard Classification: Non-Health Hazard Applications\u003cbr data-start=\"2176\" data-end=\"2179\"\u003e• Maximum Working Pressure: 175 PSI\u003cbr data-start=\"2214\" data-end=\"2217\"\u003e• Maximum Operating Temperature: 250°F (121°C)\u003cbr data-start=\"2263\" data-end=\"2266\"\u003e• Minimum Operating Temperature: 33°F (0.5°C)\u003cbr data-start=\"2311\" data-end=\"2314\"\u003e• Minimum Working Pressure: 25 PSI\u003cbr data-start=\"2348\" data-end=\"2351\"\u003e• Installation Orientation: Horizontal or Vertical\u003cbr data-start=\"2401\" data-end=\"2404\"\u003e• Service Media: Hot and Cold Water\u003cbr data-start=\"2439\" data-end=\"2442\"\u003e• Connection Type: Female NPT Union Connections\u003cbr data-start=\"2489\" data-end=\"2492\"\u003e• Function: Potable Water Backflow Protection\u003cbr data-start=\"2537\" data-end=\"2540\"\u003e• Application: Boiler Feed Lines and Process Equipment Protection \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"2645\" data-end=\"2669\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"2670\" data-end=\"2878\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e• Watts LF9D-M3 Lead-Free Dual Check Valve Backflow Preventer\u003cbr data-start=\"2731\" data-end=\"2734\"\u003e• Watts 9D-M2 Dual Check Valve Backflow Preventer\u003cbr data-start=\"2783\" data-end=\"2786\"\u003e• Zurn Wilkins 9D Series Dual Check Backflow Preventer\u003c\/p\u003e","brand":"WATTS","offers":[{"title":"New","offer_id":51731225149742,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_b459243a-35c7-47c5-a5b4-df6d44c1a15a.jpg?v=1770595728","url":"https:\/\/plgautomation.com\/products\/watts-9d-m3-backflow-preventer-w-atmospheric-vent-175-psi-250-f","provider":"PLG Automation ","version":"1.0","type":"link"}